SortableViewModelCollectionTItemModel, TItemViewModel - класс

Public MustInherit Class SortableViewModelCollection(Of TItemModel As Class, TItemViewModel As ViewModel(Of TItemModel))
	Inherits ViewModelCollection(Of TItemModel, TItemViewModel)

generic<typename TItemModel, typename TItemViewModel>
where TItemModel : ref class
where TItemViewModel : ViewModel<TItemModel>
public ref class SortableViewModelCollection abstract : public ViewModelCollection<TItemModel, TItemViewModel>

[<AbstractClassAttribute>]
type SortableViewModelCollection<'TItemModel, 'TItemViewModel when 'TItemModel : not struct when 'TItemViewModel : ViewModel<'TItemModel>> = 
    class
        inherit ViewModelCollection<'TItemModel, 'TItemViewModel>
    end